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Commit d9928c25 authored by Robert Richter's avatar Robert Richter
Browse files

oprofile: add op_cpu_buffer_add_data() 



This function can be used to attach data to a sample. It returns the
remaining free buffer size that has been reserved with
op_cpu_buffer_write_reserve().

Signed-off-by: default avatarRobert Richter <robert.richter@amd.com>
parent ae735e99

drivers/oprofile/cpu_buffer.c

+1 −1
Original line number Diff line number Diff line
@@ -258,7 +258,7 @@ op_add_code(struct oprofile_cpu_buffer *cpu_buf, unsigned long backtrace, 
	sample->event = flags;



	if (size)

		sample->data[0] = (unsigned long)task;

		op_cpu_buffer_add_data(&entry, (unsigned long)task);



	op_cpu_buffer_write_commit(&entry);

drivers/oprofile/cpu_buffer.h

+12 −0
Original line number Diff line number Diff line
@@ -78,6 +78,18 @@ int op_cpu_buffer_write_commit(struct op_entry *entry); 
struct op_sample *op_cpu_buffer_read_entry(struct op_entry *entry, int cpu);

unsigned long op_cpu_buffer_entries(int cpu);



/* returns the remaining free size of data in the entry */

static inline

int op_cpu_buffer_add_data(struct op_entry *entry, unsigned long val)

{

	if (!entry->size)

		return 0;

	*entry->data = val;

	entry->size--;

	entry->data++;

	return entry->size;

}



/* extra data flags */

#define KERNEL_CTX_SWITCH	(1UL << 0)

#define IS_KERNEL		(1UL << 1)